# 1117-3.3

**IDCHIP** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

1117-3.3 from IDCHIP, in a SOT-223. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Ground reference for the fixed-output (3.3V) version. On adjustable variants this same pin is the ADJ feedback input; on the -3.3 fixed part it is tied to system ground. |
| 2 | VOUT | power_out | Regulated 3.3V output (±1% at TJ=25°C, 3.235-3.365V over 10mA-1A, VIN 4.75-10V). Requires at least 22µF output capacitor for stability per the typical application circuit. |
| 3 | VIN | power_in | Unregulated input supply, up to 12V absolute maximum. For the 3.3V variant, recommended VIN range is 4.75V to 10V. Typical application uses a 10µF input capacitor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | IDCHIP |
| Package | SOT-223 |
| Category | PMIC |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `1117-3.3H`
- `1117-3.3H-3.3`
- `1117-3.3R`
- `1117-3.3T`
- `1117-3.3S`
- `1117-3.3D`

## Related parts (NOT interchangeable)

The extractor listed these alongside 1117-3.3, but they are **different parts** with different electrical characteristics. Do not order them as substitutes.

- `1117-3.3H-1.8`
- `1117-3.3H-ADJ`

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output voltage (3.3V fixed), TJ=25°C | VOUT | 3.267 | 3.3 | 3.333 | V | IOUT=10mA, VIN=5V, TJ=25°C, 0≤IOUT≤1A, 4.75V≤VIN≤10V | 4 |
| Output voltage (3.3V fixed), full temperature range | VOUT | 3.235 | 3.3 | 3.365 | V | IOUT=10mA, VIN=5V, TJ=25°C, 0≤IOUT≤1A, 4.75V≤VIN≤10V | 4 |
| Ilimit current limit | Ilimit | 1 | 1.1 | 1.2 | A |  | 4 |
| Quiescent current | Iq |  | 5 | 10 | mA | 4.25V≤VIN≤6.5V | 4 |
| Line regulation | Rline |  | 3 | 7 | mV | VINMIN ≤VIN≤ 12V, VOUT=Fixed/Adj, IOUT=10mA | 4 |
| Load regulation | Rload |  | 6 | 12 | mV | 10mA≤IOUT≤ 1A, VOUT=Fixed/Adj | 4 |
| Ripple rejection ratio | PSRR |  | 60 | 75 | dB | fRIPPLE=120Hz, (VIN-VOUT)=3V, VRIPPLE=1VPP | 4 |
| Output voltage temperature stability | TSOUT |  | 0.3 |  | % |  | 4 |
| Thermal shutdown point | TSD |  | 150 |  | °C |  | 4 |
| Temperature stability |  |  | 0.5 |  | % |  | 5 |
| RMS output noise |  |  | 0.003 |  | % | % of VOUT, 10Hz≤f≤10kHz | 5 |
| Thermal resistance junction-to-ambient, SOT-223-3L (no heatsink) | θJA |  | 120 |  | °C/W | no heatsink | 5 |
| Input voltage (absolute maximum) | VIN |  |  | 12 | V |  | 3 |
| Lead temperature (soldering) | TLead |  |  | 260 | °C | 5 s soldering | 3 |
| Operating junction temperature (absolute maximum) | TJ |  |  | 150 | °C |  | 3 |
| Storage temperature | TSTG | -65 |  | 150 | °C |  | 3 |
| ESD capability (minimum value) | ESD | 2000 |  |  | V |  | 3 |
| Input voltage (recommended) | VIN |  |  | 12 | V |  | 3 |
| Operating junction temperature (recommended) | TJ | -40 |  | 125 | °C |  | 3 |

## CAD (KiCad official)

- Symbol: `1117-3.3`
- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`
- 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files: `1117-3-3-etched.step` / `1117-3-3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1117-3-3.step` / `1117-3-3.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`1117-3-3.step`](1117-3-3.step) | 64 KB | You want the bare part, or you mark your own boards. |
| [`1117-3-3-etched.step`](1117-3-3-etched.step) | 1.2 MB | You want the part with `1117-3.3` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 303 faces against 75 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [IDCHIP datasheet](docs/1117-3-3-datasheet.pdf) (9 pp, sha256 `860cbde3d5dfdba4`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/1117-3-3-datasheet.pdf)